i pick up some tobacco and try to pull it apart a decent amount, i had just kind of rubbed it between my fingers to get the pieces to let go of each other but if you even really pull it apart then you will get great air flow, get it all evenly smoked out and save a little bit of shisha

i always leave space below the rim even on tangiers, i like to have about 1/8th of an inch give/take and i rarely burn my bowls
-matt